I installed a new T104 m for my pool pump. The clock works fine and it works fine manually. The on and off stops do not turn it on or off. The clock goes right past the on and off stops and they don, trip the switch. They are installed properly

Model number of timer is not known.
Is this new installation? Or installation that worked before and recently stopped working?
If the manual override lever on timer does not turn Load on-off, then 1) wiring is wrong or 2) timer has gone bad or 3) pump has a short.
I suspect a short since you say the pump 'tries to stop running.'
Copy following links for troubleshoot walk-thru, and correct wiring:
http://waterheatertimer.org/How-to-troubleshoot-Intermatic-timers.html
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Sounds like 240Volt WG1573 clock motor has gone bad and needs replacement. But more checking is needed.

You posted under T2100-4R which is 60 amp Intermatic control panel with a single T104M 240Volt timer mechanism.
All Intermatic timer mechanisms can fit into same control center, so you can possibly have different timer mechanism inserted into the T2100-4R control center.
The control center can have up to 4 circuit breakers.
Instruction manual shows that timer can also have fireman's switch that is wired to pool heater and causes pool heater to turn off 20 minutes before pool pump turns off.
http://www.poolandspacontrols.com/products/mechanical%20controls/60%20amp%20pool%20and%20spa%20control%20panels.aspx

(1) First thing: If you have T104 mechanism, do a troubleshoot run-down to see if trippers, clock motor, or wiring are suspect:
http://waterheatertimer.org/How-to-troubleshoot-Intermatic-timer.html

(2) Next would be to check the circuit breakers for loose wires, burned connections, or the smell of burning or crackling sound that says breaker is loose on the busbar.

(3) Check for loose wiring on T104 and test circuit:
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html
(a) Push the manual override lever to OFF position and test across terminals 1 and 2 and then across terminals 3 and 4 to make sure timer is turning off power to pump. Both tests should show 0 volts.
(b) Push manual override lever to to ON position and repeat test above. Both tests should show 240 volts.
If the test fails, then buy new T104M timer mechanism.

(4) If the T104 timer is turning off both lines in the 240Volt circuit, then pump cannot turn on since neither wire is Hot.
However if your T104 timer is actually a T101 timer or if timer has different wiring, where timer is turning off only 1 leg and not both legs of 240Volt circuit, then pump has one hot wire available and a short to ground could cause pump to turn on unexpectedly.

If you only have a Black wire, White wire and a ground wire, you are only wired for 120 volts. For 240 volts you have to have two Black wires or a Black and a Red as well as a White (neutral) and a ground.

Open following link for wiring diagrams and manual.
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html

240Volt T104 can be wired many different ways.
What is the significance of 'next to the pool pump timer?'
Are you getting power off the 240V pool pump timer to operate the new T104? This is perfectly fine. The pool pump wires would bring power from the breaker box.
Is the new T104 going to control 120Volt lights? The timer can do that, it just has to be wired correctly.
In any case, the T104 has 240Volt (or 277V) clock motor, and clock will not operate with 120V

If you add specific details, I can help with exact wiring diagram for your project.

The timer wiring provides power for the clock itself. If it is incorrectly wired or if the clock is not working, the pump will not turn on.
Gary

1) You posted under T104 240Volt timer.
If I understand correctly the dial is not rotating, but manual override works fine.

2) Buy new T100 series WG1573 240V clock motor from Grainger
Also buy extra trippers since trippers wear down.
http://www.grainger.com/Grainger/timer-accessories/timers/electrical/ecatalog/N-8hi

3) Clock motor is located on back of timer mechanism.
Tip mechanism out by releasing thumb spring located top inside box.
Check motor number before ordering.
For example T103 timer looks the same as T104, but clock voltage is 120V.
Motor is held by 2 star screws > buy star screwdriver at auto parts or hardware.
On T104, the motor is connected to electric terminals 1 and 3.
T103, the motor is connected to terminals A and 1.

4) If you have different Intermatic clock motor, check links below:
http://www.aplussupply.com/intermatic/timermotors.htm
http://www.electricsupplyonline.com/prod/intermatic-motors.php

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, expert speaks with you over phone while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Hi Dianna, I am timer expert at Fixya

1) When you say screw, I believe you mean tripper?


2) Trippers are placed on dial using thumb screw. Clock motor located on back of mechanism rotates dial. So dial rotates as time passes.
On-off trippers rotate around on the dial and push a lever back and forth that turns pump on-off.
Trippers are designed to wear down so that timer mechanism lasts longer.
You can buy replacement trippers for T100 series timers at Grainger:
http://www.grainger.com/Grainger/timer-accessories/timers/electrical/ecatalog/N-8hi

3) You posted under T104 timer.
Notice that grainger also sells WG1573 240Volt clock motors for the T104.
Clock motors slow down and burn out.
Clock motors are replaced by tipping mechanism out of box using thumb spring located inside box at top. Clock motor is attached with 2 small star screws. Buy star screwdriver at auto parts or hardware.
When ordering trippers, you might want extra clock motor on hand for when the dial stops rotating.

4) Open following link to see manual and wiring instructions for T104.
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, expert speaks with you over phone while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Your Intermatic timer has a manual override.
The override is a good diagnostic.
Click the manual override and see if pump turns on and off.

Next, watch if the clock is rotating.
If the clock is rotating, the OFF tripper may be worn out and you need a new tripper



If the clock wheel is not rotating, you need a new clock motor.
If you have T104, your clock motor is 240Volts
If you have T101 or T103, your clock motor is 125Volts
Buy trippers and clock motors at Grainger
Clock motor replacement takes a small star-screwdriver bit
http://www.grainger.com/Grainger/timer-accessories/timers/electrical/ecatalog/N-8hi

If your manual override is not working, then the gears might be rusty and need to be cleaned or your timer needs to be replaced.
You can buy same model number timer and then swap the insides without changing boxes.

Add a comment if you need more help.
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html

Intermatic Timer Motor WG1573 / WG1573-5 clock POOL FIX .. EBAY .. TO INSTALL THIS MOTOR REMOVE SCREW ON LEFT AND JUST BACK SCREW ON RIGHT A FEW TURNS, TIMER WILL ROCK UP OUT OF BASE THIS WAY . UN-HOOK WIRES ONE AT A TIME AND INSTALL WIRES FROM NEW MOTOR ONE AT A TIME.. THESE TWO WHITE WIRES GO TO LINE 1 AND 2 THESE ARE THE WIRES THAT GO TO THE 220 VOLT BREAKER ... NEED MORE HELP JUST GIVE ME A BUZZ.. JAY .. AND PLEASE VOTE .. THANKS JAY

YOU CAN LOOK THREW THE LITTLE WINDOW TO SEE THE GEARS TURNING ON THE CLOCK .. IF NOT .. Intermatic Timer Motor WG1573 / WG1573-5 clock POOL FIX ON EBAY
TO INSTALL THIS MOTOR REMOVE SCREW ON LEFT AND JUST BACK SCREW ON RIGHT A FEW TURNS, TIMER WILL ROCK UP OUT OF BASE THIS WAY . UN-HOOK WIRES ONE AT A TIME AND INSTALL WIRES FROM NEW MOTOR ONE AT A TIME.. THESE TWO WHITE WIRES GO TO LINE 1 AND 2 THESE ARE THE WIRES THAT GO TO THE 220 VOLT BREAKER ... NEED MORE HELP JUST GIVE ME A BUZZ. .. VOTE PLEASE THANKS... JAY